Byron,
Have you done any orderly troubleshooting? If not, it is time to do so
instead of "shotgunning" to try to fix it.
First, remove the KPA100 from the base K2 and see if there is normal
output from the base K2 on all bands. If the problem is in the base K2,
then do the Transmit Signal Tracing procedures listed in the back of the
K2 manual. That should identify the failing stage. Once you have found
the stage that fails, we can help if the DC voltage tables do not reveal
the failure.
73,
Don W3FPR
On 1/13/2012 9:12 AM, BYRON ALLEN wrote:
> After a few months of the RF POWER levels falling lower and lower, I
> now have no RF OUT on 10 thru 17 meters and 20 meters only has 5 watts
> out. Yes this is with the KPA100 attached. The remaining bands 30
> meter thru 80 Meters have about 25-30 watts RF out and 160 has about
> 12-15 watts out. I have changed the pre-driver ,drivers and the
> finals in the base K2 -NO-Change ,then I changed the bias transistor
> to the Finals -NO CHANGE.. Anyone have any ideas of what is happening
> to now have lost RF out on 10 thru 17 meters?????? Serial #4670
>
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